Operating means for impellers



Aug. 13, 1929. H. A. PALMER OPERATING MEANS FOR IMPELLERS 2 Sheets-SheetFiled April l1, 192'? Aug. 13, 1929. H. A. PALMER OPERATING MEANS FORINPELLERS Filed April 1l, 1927 2 Sheets-Sheetl I N V EN TOR. Harry.PaZmer,

ATTORNEY.

Patented Aug. 13, 1929 UNITED STATES 1,724,772 PATENT OFFICE.

HARRY A PALMER, OF DORCHESTER, MASSACHUSETTS, ASSIGNOR TO PALMER IN-VENTIONS, INC., F BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHU-SETTS.

l OPERATING MEANS FOR IMPF-LLERS.

Application filed April 11,

This invention relates to a driving mechanism for shaft impellers and isdesigned primarily for use in connection with internal combustionengines, but it is to be understood that a driving mechanism inaccordance with this invention can be used 1n connection with any typeof engine for which it is found applicable, and the invention has forits object to providea driving mechanism for converting a ieciprocatorymotion into a rotary motion and whereby continuous power is had byobtaining -a low speed drive from a high speed piston displacement.

Further objects of the invention are to provide a driving mechanism forsha-ft impellers, in a manner as hereinafter set `forth, and which iscomparatively simple in its construction and arrangement, strong,durable, thoroughly etiicient in its use, readily assembled, andcomparatively inexpensive to set up.

With the foregoing and other objects in view the invention consists ofthe novel con-` struction, combination and arrangementrof parts ashereinafter more specincally described, and illustrated in theaccompanying drawings wherein is shown an embodiment of the invent-ion,but it is to be understood that changes, variations and modificationscan oe resorted to which fail within the scope of the claim hereuntoappended.

in the drawings wherein like reference characters denote correspondingparts throughout the several views: l

Figure 1 is a vertical sectional view of an internal combustion engine,showing the adaptation therewith of a shaft impellerdriving mechanism inaccordance with this invention. y

Figure 2 is a` sectional plan of an internal combustion motoi showingthe adaptation thereof of a shaft impeller driving mechanism inaccordance with this invention.

Figure 3 is a fragmentary view in side elevation of a driving mechanism.

Figure 4 is a fragmentary view in section, of a driving mechanismshowing the adaptation thereof with respect to the cylinder of aninternal combustion engine.

Figure 5 is a fragmentary view in perspective of a portion of thedriving mechanism.

Figure 6 is a` perspective view of an impeller operating or actuatingmember.

1927. Serial NO. 182,804.

The driving mechanism, as shown by Way of example, is set up inconnection with an internal combustion engine of a construe` tionsimilar to that disclosed in my" application Sr. No. 182806 Filed April11, 1927, and such engine includes a cylinder l, a balanced piston 2operating in the cylinder l and closed at each end, and a air of shaftimpellers 3 which are connecte to a power transmitting shaft 4. Eachimpeller is in the form of a wheel cam and provides means for drivingthe shaft 4. The driving mechanism in accordance with this invention isconnected with the piston 2 and bodily carried thereby.

The driving mechanism in accordance with this invention includes a wristpin 5 which extends through the piston 2, as well as the cylinder 1 andprojects laterally a substantial distance from opposite sides of thecylinder 1. The wrist pin 5 is bodily carried by the piston 2, duringthe reciprocations thereof, and the driving mechanism is so set up as toconvert the reciprocatory motion of the piston into a rotating one forthe impellers 3 whereby the shaft 4 is carried with the impellers, asthese latter are fixedly secured to said shaft as at G. The cylinder 1is formed with slots to provide for the travel of the Wrist pin 5 duringthe reciprocations of the piston. The cylinder 1 is formed on oppositesides with oppositely extending enlargements 7, 8 of channel shapedcontour in sectional plan. The slots formed in the cylinder 1 for thepassage of the wrist pin 5 are indicated at 9. Secured in theenlargements 7 and 8 are vertically disposed guide members 10, 11respectively and each of which is slotted as at 12 and said slots 12register with the slots 9. The inner faces of the guides 10, l1 at thesides thereof are offset as indicated at 13, 14 and with the offsetportions 14 arranged outwardly with respect to the offset portions 13.The offset portions provide bearing surfaces for roller bearings. Theroller bearings are arranged in pairs and the roller bearings of eachpair are indicated at 15, 16. The roller bearings 16 ride against thebearing surfaces formed by the offset portions 13 and the rollerbearings 15 ride against the bearing surfaces formed by the offsetportions 14. The pairs of roller bearings are connected to the wrist pin5 and carried thereby and during the travel of the wrist pin the saidroller bearings ride against the bearing surfaces formed by the offsetportions 13, 1li. The wrist pin 5 is disposed at the transverse medianof the piston 2 and the manner of setting up the bearing surfaces, whichcoact with the roller bearings, prevent any possibility of wabbling ordisplacement of the piston during its reciprocations and furthermorebalances the piston during its movements.

The wrist pin 5 adjacent each pair of roller bearings is provided withan impeller operating member or element consisting of an annulus17mounted on bearings 18 and with the annulus of materially greaterdiameter than either one of the roller bearings of either pair. Eachelement 17 rides against the edge of an impeller 3 and is of the samewidth as the edge of the impeller,

Secured to the wrist pin 5, at each end thereof, as well as dependingtherefrom is a holder element referred to generally by the referencecharacter 19 and which in cludes a triangular shaped upper portion 20,which is iXedly secured to the end of the wrist pin, as at 21. The lowerend of the portion 2O is provided with a stub shaft 22 extendinginwardly therefrom and carry; ing a roller bearing 23 which ridesagainst a ridge or cam surface 24 formed on the outer face of theimpeller 3. rlhe holder element 19 further includes a fork shaped lowerportion 25 which straddles hub 26 of the im peller and prevents twistingof the wrist pin during the reciprocation ofthe piston. The roller 23acts asv a means to maintain the element 17 against the edge 27`of theimpeller and the rolling of the-element 17 against the edge 27 of theimpeller 34will provide for the rotation of such element under suchconditions carrying the shaft 4 therewith. The impellers 3 are of ovalcontour and in Figure 1 the high parts of the impellers are shown asengaged by the elements 17 and in Figure 2 the low parts thereof. Thecamrsurface or ridge 24 conforms substantiallyl in contour to the edge27 of the impeller. The impeller 3 forms no part of this inventionand-is not claimed, as the invention relates solely to the drivingmechanism for the impeller or rather impellers, as the mechanism isconstructed for driving two impellers in unison.

The construction and arrangement of the drivingmechanism provides. forthe converting of reciprocatory motion into rotary motion and furtherprovides whereby. continuous power is hadby obtaining a low speed drivefrom a high speed piston displacement. The pairs of rollers carried bythe wrist pin 5 guide the saine when it is` bodily carried by the pistonduringthe reciprocations of the latter, and as aforesaid therollerscoact with the bearing surfaces on the guides to prevent twistinglorwabbling of the piston and further to maintain itsA balance. The settingup of the bearingskin connection with the rolling part-s of' themechanism reduces friction toA a minimum and prevent overheating.

t is thought the many advantages ofa driving mechanism for shaftlimpellers, in accordance with this invention, can be readily understood,andalth'ough the preferred embodiment of the inventionis as illustratedand described, yet, it is to be understood'that changes in the detailsoffconstruction can be hadwhich willfall within the scope of theinvention as claimed:

What I claim is:

In ashaft impeller driving mechanism for converting reciprocatory motionintorotary motion and with the impeller of the wheel cam type, a bodilyshiftable wrist pin adapted'to be connected transversely of and bodilycarriedwith a reciprocating element, a pair of vspaced impelleroperatii'ig'elements carri'edbyl saidpin and'each adapted'to haverolling contact with an impeller for rotating it, a pair of holderelements each extended from one end of the pin and provided with aroller element having rolling contact with the impeller andprovidingmeans for maintaining an operating element in rolling contact with'v theimpeller, sai'dlholder elements further including means to preventtwisting of said pin when bodily shifted'by its reciprocating source.

1n testimony whereof', I affix my signature hereto.

HARRY A. PALMER:

